Why is the day before a higher percentage of getting pregnant more than actual ovulation day?

maysak

I don’t understand? Can someone please explain this to me? My app says I ovulate today and my sex schedule is as follows:

(8/24)

12:20am

(8/25)

12:25am

9:19pm

(8/27)

1:15am

5:27pm

(8/28)

1:30am

1:25pm

(8/29)

5:13pm

(8/30)

2:30pm

(8/31)

11:13pm

3:44pm

(9/1)

7:32pm

(9/2)

5:56pm

9/3 OVULATION DAY

2:30am

2:10pm